While solving the value of Sin(120°), we should take Cos(180 - 60) and not Cos(90 + 30)
Naefiya24:
So whats the qn
the above question is wrong i meant "While solving cos(120°), why should i take cos(180 - 60) and not cos(90 + 30) ?"
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Both give you the same answer and it doesn't matter much with ehich you find the answer (in this case). You can use any method, which you find more convenient.
Please take care the next time that your more precise in your question. It was vague this time.
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